Ok, this is what I was trying to do when I lost the weeks data. I wanted to clear out all the inactive accounts (not to mention the spam signups) so I pruned the users. Originally I got almost all the members by mistake... D'oh.

However, this time around I got everyone who's signed up to the site and not posted the once. If this affects your account, as you've never posted, then my apologies, but you are welcome to sign back up again. Your usernames should be available this time. To stop it happening to you again though, make a post or two (just say hello!) and you'll not be caught in the next prune.